I have two UWP controls in two assemblies, please refer to the following for more details.
1. KWFlexButton inherits from Control and the assembly name is FlexButton.
2. KWFlexAButton inherits from KWFlexButton and the assembly name is FlexAButton.
I made two vsix and installed them, I found KWFlexAButton could not be shown in toolbox.
After I investigated, I guessed vs loaded KWFlexAButton is earlier than KWFlexButton.
Therefore I tried to change the assembly name of FlexAButton to FlexCButton, I found KWFlexAButton is shown.
I wonder it is the default behavior of visual studio? Do you any other ideas?